8. Ten cu ft of helium at 20 psia and 80°F are compressed isentropically 1-2 to 80 psia. The helium is then expanded polytropically 2-3 with n = 1.30 to the initial temperature. An isothermal 3-1 returns the helium to the initial state. Find T2, V2, P3, Qa, Qr, W, S3-1, and mep.

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.